What's happening here?

This example demonstrates the basics: a layer with an image displayed on it. This is the fundamental setup for working with UI elements in Laymur.

// Create the layer
const layer = new UIFullscreenLayer({
  resizePolicy: new UIResizePolicyFixedHeight(1920, 1920)
});

// Add an image to the layer
new UIImage(layer, downloadButtonTexture, {
  x: 50,
  y: 50,
});

// Render the layer
layer.render(baseScene.renderer, deltaTime);